Ningbo Zhonggao Rubber & Plastic Manufacturing Co., Ltd. is one of the most reliable manufacturers and suppliers of automotive rubber gaskets in China. The company has world-leading production equipment and strong manufacturing capabilities. Welcome to wholesale custom made automotive rubber gaskets from our factory.
Automotive Rubber Gaskets for OEM & Replacement Applications
Custom automotive rubber gaskets designed for fluid, air, dust, vibration, and environmental sealing across automotive systems. Available in NBR, EPDM, FKM, CR, Silicone/VMQ, and other application-specific compounds, with custom dimensions, profiles, tooling, and manufacturing options based on your drawing, sample, and operating requirements.
Technical Parameters
Rubber Material Selection
|
Material |
Operating Temperature |
Key Resistance |
|
EPDM |
−50°C to +150°C |
Water, Steam, Weather & Ozone |
|
NBR |
−40°C to +120°C |
Oil, Fuel & Automotive Fluids |
|
FKM |
−20°C to +200°C |
Oil, Fuel & Chemicals |
|
CR (Neoprene) |
−40°C to +120°C |
Weather, Ozone & Environmental Exposure |
|
Silicone / VMQ |
−70°C to +220°C |
High & Low Temperature Exposure |
|
NR |
-60°C to +90°C |
Water & Air |
Automotive Rubber Gasket Specifications
|
Parameter |
Specification / Reference |
|
Operating Temperature |
NBR: -40°C to +120°C; Silicone: -70°C to +220°C; EPDM: -50°C to +150°C; NR: -60°C to +90°C; CR: -40°C to +120°C; FKM: -20°C to +200°C |
|
Hardness |
NBR: 55–75 Shore A; Silicone: 55–65 Shore A; EPDM: 55–75 Shore A; NR: 50–70 Shore A; CR: 60–75 Shore A; FKM: 65–85 Shore A |
|
Tensile Strength |
≥5 MPa |
|
Elongation at Break |
≥200% |
|
Compression Set |
≤20% (70°C × 22h) |
|
Tear Strength |
≥15 kN/m |
|
Sealing Type |
Static liquid and gas sealing |
|
ID |
5–500 mm* |
|
OD |
10–550 mm* |
|
Thickness |
0.5–10 mm* |
|
Profile Height |
1–20 mm* |
|
Hole Diameter |
2–30 mm* |
|
Bolt Hole Quantity |
2–24 holes* |
|
Hole Position Tolerance |
±0.10–±0.30 mm* |
|
Dimensional Tolerance |
±0.10–±0.30 mm* |
|
Molded Feature Tolerance |
±0.10–±0.30 mm* |
|
Compression Requirement |
10–30%* |
|
Surface Finish |
Ra 1.6–6.3 μm* |
*Typical industry reference ranges. Actual dimensional capability and tolerances depend on gasket size, rubber compound, hardness, geometry, tooling structure, manufacturing process and approved drawing. Critical sealing dimensions should be confirmed during drawing review and sample validation.
Custom Automotive Rubber Gaskets
Custom automotive rubber gaskets should be developed around the actual sealing interface rather than selected only by material name or nominal dimensions.
Custom Rubber Materials
Material options include:
• NBR
• EPDM
• FKM
• CR / Neoprene
• Silicone / VMQ
• NR
• Other compounds
Material selection should consider the actual media, operating temperature, pressure, compression, environmental exposure, and required service conditions.
Custom Dimensions & Geometry
Gasket dimensions and profiles can be produced according to an approved drawing or sample, including:
• ID and OD
• Thickness
• Hole diameter and hole pattern
• Cutouts and openings
• Flat and ring profiles
• Full-face gasket designs
• Bead and grooved profiles
• Molded sealing features
• Other application-specific geometries
Custom Hardness & Performance
Rubber hardness and performance requirements can be selected according to:
• Sealing load and compression
• Operating temperature
• Media or fluid contact
• Installation conditions
• Gasket structure and sealing requirements
Secondary Processing
Additional processing is available for gasket designs requiring:
• Precision holes and perforations
• CNC stamping
• Edge profiling
• Custom cutouts and profiles
These processes can be combined with the gasket design to meet specific dimensional and installation requirements.
Custom Tooling
Custom molds and tooling can be developed according to:
• Approved drawings or samples
• Gasket dimensions and profile
• Rubber compound and shrinkage
• Critical sealing features
• Production volume and inspection requirements
Samples can be produced for evaluation and approval before mass production.
OEM & Replacement Support
We support automotive gasket projects based on:
• Customer drawings or CAD files
• Existing gasket samples
• Specified dimensions and tolerances
• Material and hardness requirements
• OEM or replacement specifications
Approved drawings, samples, and specifications can be retained as production references for repeat orders.
Automotive Rubber Gasket Applications
Automotive rubber gaskets are used to maintain reliable sealing between mating components while helping prevent fluid and gas leakage, dust ingress, vibration transmission, and environmental exposure.
- Engine & Powertrain
- Fuel & Fluid Systems
- Chassis & Mechanical Systems
- Electrical & New Energy Vehicles
- HVAC & Body Systems
Automotive Rubber Gasket Manufacturing & Tooling
Automotive rubber gaskets can require different manufacturing methods depending on their profile, dimensions, production volume, and sealing requirements.
Mold Development → Rubber Molding → Die Cutting & Secondary Processing → Sample Production
From Prototype to Mass Production Process:
Requirement Review → Material & Process Selection → Tooling Development → Sample Production → Approval & Production → Final Inspection & Delivery
Zhonggao operates a 5,000 m² rubber manufacturing facility with 20 production lines, 40+ experienced technicians, and 10 million pieces of monthly production capacity, supporting prototype development, short-run production, and high-volume automotive rubber gasket orders.
Automotive Rubber Gasket Quality Control
Material Verification
Approved rubber compounds are verified through material certificates, compound identification, hardness, tensile strength, elongation, compression set, and fluid compatibility testing against the specified material and application requirements.
Dimensional Verification
Critical ID, OD, thickness, hole positions, profiles, cutouts, and other sealing dimensions are inspected against the approved drawing or sample.
Physical Property Testing
Depending on project requirements, physical properties can be evaluated for hardness, compression set, elongation, tensile strength, and other specified characteristics.
Process Control
Mixing, molding, vulcanization, trimming, and secondary processing are controlled according to the approved product and process requirements.
Application-Specific Validation
For projects with defined fluid, temperature, pressure, or environmental requirements, testing criteria can be established according to the customer's application and applicable specifications.
Sample Approval
Samples provide a practical stage for checking fit, dimensions, material, installation, and sealing requirements before production quantities are released.
Zhonggao's quality system includes dedicated QC personnel, laboratory testing equipment, raw-material inspection, and finished-product inspection, with IATF 16949, ISO 9001, ISO 14001, and ISO 45001 certifications.
OEM / OE Replacement & Engineering Support
Automotive rubber gasket procurement can involve new OEM development, replacement parts, aftermarket programs, or existing component reproduction.
We can provide:
- OEM Manufacturing
- OEM Manufacturing
- Engineering Support
- Drawing & Sample Review
Long-Term B2B Ordering & Supply Reliability
For repeat automotive gasket orders, the approved sample should become the reference for subsequent production.
Ordering Process:
Approved Sample → Production Standard → Batch Inspection → Shipment Release
A repeat-order specification can include:
- Approved drawing
- Material or compound requirement
- Hardness
- Critical dimensions
- Tolerances
- Tooling reference
- Inspection requirements
- Packaging requirements
FAQ
Q: How Should Automotive Rubber Gaskets Be Stored Before Installation?
A: Store gaskets in a cool, dry environment away from direct sunlight, ozone, heat, oils, and chemicals to help maintain their condition.
Q: What Is the Typical Service Life of an Automotive Rubber Gasket?
A: Service life depends on the rubber compound, temperature, media, compression, sealing design, and installation conditions.
Q: Can Automotive Rubber Gaskets Be Supplied as Gasket Kits or Sets?
A: Yes, gaskets can be supplied individually or assembled into application-specific kits according to an approved parts list.
Q: Can You Manufacture Automotive Rubber Gaskets for Replacement Parts?
A: Yes, replacement gaskets can be manufactured from drawings, samples, dimensions, or available part information.
Q: How Can I Identify the Correct Rubber Gasket for an Existing Automotive Part?
A: The correct gasket can be identified using the original part number, drawing, sample, dimensions, or application information.
Q: Are Automotive Rubber Gaskets Available With Individual Part Identification?
A: Yes, part numbers, material codes, lot information, labels, and customer-specific identification can be arranged.
Q: What Packaging Options Are Available for Automotive Rubber Gaskets?
A: Packaging can be customized according to gasket size, quantity, transportation requirements, and customer handling needs.
Q: What Is the MOQ for Automotive Rubber Gaskets?
A: MOQ depends on the gasket size, design, material, tooling requirements, and production quantity, with flexible arrangements available for different projects.
Q: How Long Does It Take to Deliver Automotive Rubber Gaskets?
A: Sample delivery is typically 3–15 days, while mass-production delivery is typically 10–30 days, depends on tooling, material availability, order quantity, and production requirements.
Q: What Shipping Methods Are Available for Automotive Rubber Gasket Orders?
A: Orders can be shipped by sea freight, air freight, express delivery, or other suitable transportation methods based on quantity, destination, and delivery requirements.
Custom Automotive Rubber Gaskets for Your Project
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